[sdiy] magic hi-fi amps

harry harrybissell at prodigy.net
Mon Jun 24 03:27:37 CEST 2002


Aw come on... cut a little slack here....

the wattage was that drawn from the 120VAC line... both channels driven.

(that IS what some folks rate as 'watts'...)

H^) harry

metasonix at earthlink.net wrote:

> >That is, those audio visual surround sound decoder/amplifiers. There are
> >hundreds of them. And they all claim to push out 100watts/rms on all
> >5 (or in some cases 6, the sub woofer out as well) channels, yet they
> >barely weigh 8kg.
> >(Onkyo, Denon, Marantz are all guilty I'm afraid).
>
> You need to take the historical view. This kind of crude
> salesmanship has been going on since high fidelity became
> a mass market in the 1950s.
>
> I have a Fisher ad from 1955. In it, they claimed their new
> model 50-A amplifier produced 50 watts, or "100 watts peak!"
> It used two triode-connected 1614s, which are metal-cased
> 6L6s. There is NO WAY IN HELL you can get more than 25 watts peak
> out of those 2 tubes, even at the limit of their plate disspation!
> Believe me....I've tested 50As on the bench. ALL of their published
> specs were inflated.
>
> Avery Fisher was famous for such ads. Consumer Reports magazine
> wrote nasty editorials about him. Yet his company thrived;
> he sold out to Sanyo for millions in 1974, and died filthy rich.
> New York City named a major concert hall after him.
>
> I had to fix a Philips surround receiver recently.
> It used LM1875 ICs for all 5 channels,
> which are each good for maybe 20 watts at best--
> yet the packaging claimed "350 watts!!"
>
> E. Barbour
> metasonix

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